EVAL-AD7484_15 Datasheet, PDF (11/20 Pages) Analog Devices – Evaluation Board for 3 MSPS, 14-Bit SAR ADC

TAKING SAMPLES
The main window (see Figure 3 and Figure 4) is used to display
and read samples and additionally to control the EVAL-CONTROL
BRD2 and the AD7484 evaluation board. The evaluation board
can run at up to 2.2 MSPS, so the user can choose any sampling
frequency up to this rate. The number of samples to be taken
can also be chosen. These samples are uploaded and displayed,
and an FFT and a histogram are calculated and displayed.
Sampling is controlled through the main window menus and
controls and displayed in list boxes and oscilloscopes (DSOs).
Menu Bar
File Menu
Setup Menu. Displays the Setup Menu window, as shown in
Figure 5.
Load Raw Data. Loads data that has been saved by the software
during a previous session.
Save Raw Data. Saves the current set of sample data points. The
data can be reloaded to the evaluation software later or can be
used by other programs for analysis.
Save Binary Data. Saves the current set of sample data points in
binary format as a text file. This option can be useful for tasks
such as examining code flicker and looking for stuck bits.
Save FFT Data. Saves the current set of FFT data points. FFT
data cannot be reloaded into the EVAL-CONTROL BRD2
software but can be loaded into other software packages for
additional analysis.
EVAL-AD7484
Exit. Quits the program.
Printer Port Menu
Selects the printer port used for communication with the
EVAL-CONTROL BRD2, as follows:
LPT1. Selects 0x378 as the printer port base address. This is the
default option.
LPT2. Selects 0x278 as the printer port base address.
PRN. Selects 0x3BC as the printer port base address.
Help Menu
Provides information about the current version of the software.
Controls
Sample. Instructs the EVAL-CONTROL BRD2 to take the
required number of samples at the required frequency from the
evaluation board.
Cont Samp. Repeats the sampling process indefinitely until
Stop Samp is clicked. While the software is continuously
sampling data, the other control buttons are disabled.
Stop Samp. Stops the sampling process.
Reset. Causes the EVAL-CONTROL BRD2 to perform a reset.
When this happens, the power supplies to the evaluation board
are turned off and the program in the DSP memory is lost. The
user should repeat the setup instructions to download another
program if required.
Quit. Exits the software, but the program running on the
EVAL-CONTROL BRD2 is not terminated.
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